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Related Concept Videos

Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

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Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
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Conservation of Mass in Moving, Nondeforming Control Volume01:14

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Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
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Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

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Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
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Weir01:24

Weir

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A weir is a hydraulic structure designed to partially obstruct an open channel, enabling precise control and measurement of water flow. By forcing water to flow over or through it, a weir allows for accurate determination of discharge rates, making it an essential tool in water resource management. These structures are extensively used in regulating river flows, irrigation systems, and flood control channels.Types of Weirs and Their FeaturesWeirs are categorized primarily into sharp-crested and...
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Design Example: Measuring Distance Between Two Points with Obstructions01:10

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When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
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Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
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Related Experiment Video

Updated: Feb 22, 2026

Watershed Planning within a Quantitative Scenario Analysis Framework
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Stream, Lake, and Reservoir Management.

Jingjing Dai, Ying Mei, Chein-Chi Chang

    Water Environment Research : a Research Publication of the Water Environment Federation
    |September 29, 2017
    PubMed
    Summary

    This review summarizes 2016 research on managing streams, lakes, and reservoirs. It covers water quality, operations, models, restoration, biota, and climate impacts for effective freshwater ecosystem management.

    Area of Science:

    • Environmental Science
    • Water Resource Management
    • Ecology

    Background:

    • Freshwater ecosystems like streams, lakes, and reservoirs face complex management challenges.
    • Effective management requires understanding various interconnected factors including water quality, biota, and operational strategies.

    Purpose of the Study:

    • To review selected 2016 publications on stream, lake, and reservoir management.
    • To synthesize current knowledge across key areas of freshwater ecosystem management.

    Main Methods:

    • Literature review of 2016 publications.
    • Categorization of research into specific management-focused sections.

    Main Results:

    • Key findings from 2016 research on water quality, reservoir operations, and modeling are presented.

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  • Recent advancements in remediation, restoration, biota studies, and climate effects on freshwater bodies are highlighted.

    • Conclusions:

    • The review provides a snapshot of 2016 research trends in freshwater management.
    • It identifies critical areas for future research and management strategies for streams, lakes, and reservoirs.